Yesterday my car was working fine. This morning when I tried starting it it won't. It turns over but it won't start. What could be wrong with it. I don't think is the battery cause I have full power on the car.

Perform tests in the link below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-11.html#post2123675

Begin by removing and fully charging the battery. Most auto parts stores will test and charge batteries for free. If it doesn't spark or the spark is weak, install an OEM coil.

Kitch428 is our Toyota and Lexus expert. He'll likely see your post shortly and respond.